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Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers.

Skinner, T.D. and Wang, M. and Hindmarch, A.T. and Rushforth, A.W. and Irvine, A.C. and Heiss, D. and Kurebayashi, H. and Ferguson, A.J. (2014) 'Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers.', Applied physics letters., 104 (6). 062401.

Abstract

Current-induced torques in ultrathin Co/Pt bilayers were investigated using an electrically driven ferromagnetic resonance technique. The angle dependence of the resonances, detected by a rectification effect as a voltage, was analysed to determine the symmetries and relative magnitudes of the spin-orbit torques. Both anti-damping (Slonczewski) and field-like torques were observed. As the ferromagnet thickness was reduced from 3 to 1 nm, the sign of the sum of the field-like torque and Oersted torque reversed. This observation is consistent with the emergence of a Rashba spin orbit torque in ultra-thin bilayers.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1063/1.4864399
Publisher statement:© 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. he following article appeared in Applied Physics Letters 104, 062401 (2014); doi: 10.1063/1.4864399 nd may be found at http://scitation.aip.org/content/aip/journal/apl/104/6/10.1063/1.4864399
Record Created:03 Apr 2014 16:50
Last Modified:04 Apr 2014 10:08

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